Effect of electrical current density, apparent contact pressure, and sliding velocity on the electrical sliding wear behavior of Cu–Ti3AlC2 composites

Zhao, Hao; Feng, Yi; Zhou, Zijue; Qian, Gang; Zhang, Jingcheng; Huang, Xiaochen; Zhang, Xuebin

doi:10.1016/j.wear.2019.203156

Cited by 38 publications

(14 citation statements)

References 29 publications

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“…It can be said that the graphene additives in the materials form a significant amount of lubricating film in the later stages of the wear test [ 67 ]. In addition, higher velocity prevents the favorable contact conditions between the pin and disk materials and causes a decrease in wear [ 68 ]. As a representative parameter group, the sintering time and temperature influence interfacial bonding and resultant structural integrity [ 69 ].…”

Section: Resultsmentioning

confidence: 99%

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Tribological Aspects, Optimization and Analysis of Cu-B-CrC Composites Fabricated by Powder Metallurgy

et al. 2021

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Tribological properties of engineering components are a key issue due to their effect on the operational performance factors such as wear, surface characteristics, service life and in situ behavior. Thus, for better component quality, process parameters have major importance, especially for metal matrix composites (MMCs), which are a special class of materials used in a wide range of engineering applications including but not limited to structural, automotive and aeronautics. This paper deals with the tribological behavior of Cu-B-CrC composites (Cu-main matrix, B-CrC-reinforcement by 0, 2.5, 5 and 7.5 wt.%). The tribological characteristics investigated in this study are the coefficient of friction, wear rate and weight loss. For this purpose, four levels of sliding distance (1000, 1500, 2000 and 2500 m) and four levels of applied load (10, 15, 20 and 25 N) were used. In addition, two levels of sliding velocity (1 and 1.5 m/s), two levels of sintering time (1 and 2 h) and two sintering temperatures (1000 and 1050 °C) were used. Taguchi’s L16 orthogonal array was used to statistically analyze the aforementioned input parameters and to determine their best levels which give the desired values for the analyzed tribological characteristics. The results were analyzed by statistical analysis, optimization and 3D surface plots. Accordingly, it was determined that the most effective factor for wear rate, weight loss and friction coefficients is the contribution rate. According to signal-to-noise ratios, optimum solutions can be sorted as: the highest levels of parameters except for applied load and reinforcement ratio (2500 m, 10 N, 1.5 m/s, 2 h, 1050 °C and 0 wt.%) for wear rate, certain levels of all parameters (1000 m, 10 N, 1.5 m/s, 2 h, 1050 °C and 2.5 wt.%) for weight loss and 1000 m, 15 N, 1 m/s, 1 h, 1000 °C and 0 wt.% for the coefficient of friction. The comprehensive analysis of findings has practical significance and provides valuable information for a composite material from the production phase to the actual working conditions.

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Section: Resultsmentioning

confidence: 99%

“…This phenomena was observed in a study about tribological behavior composites [ 70 ]. As observed in the wear rate results, the second level of sliding velocity causes less weight loss [ 68 ]. Sintering time and temperature are the functions of plastic deformation [ 71 ].…”

Section: Resultsmentioning

confidence: 99%

Tribological Aspects, Optimization and Analysis of Cu-B-CrC Composites Fabricated by Powder Metallurgy

et al. 2021

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“…Fretting wear widens the contact zone, reducing the ECR. This result has been validated by electrical contact experiments [42]. In the simulation considering the fretting wear, there is a competition between the effects of the fretting wear and the temperature rise on ECR.…”

Section: Wear Profile Contact Pressure Temperature and Electric Potentialmentioning

confidence: 52%

Numerical Study of Coupled Electrical-Thermal-Mechanical-Wear Behavior in Electrical Contacts

Shen

2021

Metals

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Electrical contacts involve complicated electrical, thermal, and mechanical phenomena. Fretting wear as a surface damage mechanism significantly weakens the performance of electrical contact components. In this study, a numerical approach is developed to investigate the electrical-thermal-mechanical-wear coupling behavior of electrical contacts. An electrical contact conductance law is used with the current conservation model to evaluate the electrical behavior. A transient heat transfer model, including the Joule heating behavior and a thermal contact conductance law, is employed to calculate the temperature field. Both contact conductance laws are related to the contact pressure distribution obtained by the contact stress analysis. Based on the predicted contact stress and relative slip on contact surfaces, the energy wear model is used to study the evolution of fretting wear depth and contact surface geometry. The material properties in these models are temperature-dependent. The proposed numerical approach is implemented in a finite element modeling of electrical contacts, which is validated by comparing the predicted and experimental results of the wear scar profile. The effects of the fretting wear on the electric potential, current density, contact resistance, temperature, and contact pressure are numerically studied.

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“…The wear rate of the sliding pair is influenced by the lubricating film on the contact surfaces under each test condition. When the sliding speed increases, the wear rate reduces first and then increases while the contact voltage drop regularly increases [20].…”

Section: Introductionmentioning

confidence: 99%

Wear Behavior of Graphic Brush for Motors in the High Humidity of Tropical Climate with Current

Pham¹,

Le²,

Nguyen³

2022

Tribol. Ind.

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The motor with commutator brushes pair is widely used in industrial equipment. During operation, the brush and commutator of the motor will wear out, especially in humid tropical monsoon conditions. The commutator brushes pairs operate in both loading conditions: Mechanic and Electric. The temperature, velocity, spring pressure, current, material, and environmental conditions, especially high humidity of ambient air, directly affect the wear of commutator brushes pair. This paper presents studying results on the wear behavior of graphite brushes when used in conditions changes as relative humidity and current. Initial experimental results showed that relative humidity had influenced brush wear. The wear rate increases by 1.8 to 2 times when humidity increases from 51% to 99%. The wear graphs of the brushes depend on current more than relative humidity with tropical climate characteristics. The specific wear rate changed about 2.88 times in this study.

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Effect of electrical current density, apparent contact pressure, and sliding velocity on the electrical sliding wear behavior of Cu–Ti3AlC2 composites

Cited by 38 publications

References 29 publications

Tribological Aspects, Optimization and Analysis of Cu-B-CrC Composites Fabricated by Powder Metallurgy

Tribological Aspects, Optimization and Analysis of Cu-B-CrC Composites Fabricated by Powder Metallurgy

Numerical Study of Coupled Electrical-Thermal-Mechanical-Wear Behavior in Electrical Contacts

Wear Behavior of Graphic Brush for Motors in the High Humidity of Tropical Climate with Current

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